linux-kernel - [PATCH v4 net-next 07/14] net: enetc: make enetc_set_rss

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Message-Id: <20250311053830.1516523-8-wei.fang@nxp.com>
Date: Tue, 11 Mar 2025 13:38:23 +0800
From: Wei Fang <wei.fang@....com>
To: claudiu.manoil@....com,
	vladimir.oltean@....com,
	xiaoning.wang@....com,
	andrew+netdev@...n.ch,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: christophe.leroy@...roup.eu,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev,
	linuxppc-dev@...ts.ozlabs.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v4 net-next 07/14] net: enetc: make enetc_set_rss_key() reusable

Since the offset of the RSS key registers of i.MX95 ENETC is different
from that of LS1028A, so add enetc_get_rss_key_base() to get the base
offset for the different chips, so that enetc_set_rss_key() can be
reused for this trivial.

Signed-off-by: Wei Fang <wei.fang@....com>
---
 drivers/net/ethernet/freescale/enetc/enetc.h  |  2 +-
 .../net/ethernet/freescale/enetc/enetc4_pf.c  | 11 +----------
 .../ethernet/freescale/enetc/enetc_ethtool.c  | 19 ++++++++++++++-----
 .../net/ethernet/freescale/enetc/enetc_pf.c   |  2 +-
 4 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/ethernet/freescale/enetc/enetc.h
index deda386b20a0..a3ce324c716c 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc.h
@@ -539,7 +539,7 @@ int enetc_set_mac_flt_entry(struct enetc_si *si, int index,
 int enetc_clear_mac_flt_entry(struct enetc_si *si, int index);
 int enetc_set_fs_entry(struct enetc_si *si, struct enetc_cmd_rfse *rfse,
 		       int index);
-void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes);
+void enetc_set_rss_key(struct enetc_si *si, const u8 *bytes);
 int enetc_get_rss_table(struct enetc_si *si, u32 *table, int count);
 int enetc_set_rss_table(struct enetc_si *si, const u32 *table, int count);
 int enetc_send_cmd(struct enetc_si *si, struct enetc_cbd *cbd);
diff --git a/drivers/net/ethernet/freescale/enetc/enetc4_pf.c b/drivers/net/ethernet/freescale/enetc/enetc4_pf.c
index a98ed059a83f..f991e1aae85c 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc4_pf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc4_pf.c
@@ -583,22 +583,13 @@ static void enetc4_set_trx_frame_size(struct enetc_pf *pf)
 	enetc4_pf_reset_tc_msdu(&si->hw);
 }
 
-static void enetc4_set_rss_key(struct enetc_hw *hw, const u8 *bytes)
-{
-	int i;
-
-	for (i = 0; i < ENETC_RSSHASH_KEY_SIZE / 4; i++)
-		enetc_port_wr(hw, ENETC4_PRSSKR(i), ((u32 *)bytes)[i]);
-}
-
 static void enetc4_set_default_rss_key(struct enetc_pf *pf)
 {
 	u8 hash_key[ENETC_RSSHASH_KEY_SIZE] = {0};
-	struct enetc_hw *hw = &pf->si->hw;
 
 	/* set up hash key */
 	get_random_bytes(hash_key, ENETC_RSSHASH_KEY_SIZE);
-	enetc4_set_rss_key(hw, hash_key);
+	enetc_set_rss_key(pf->si, hash_key);
 }
 
 static void enetc4_enable_trx(struct enetc_pf *pf)
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
index d14182401d81..1a8fae3c406b 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
@@ -677,6 +677,14 @@ static u32 enetc_get_rxfh_indir_size(struct net_device *ndev)
 	return priv->si->num_rss;
 }
 
+static int enetc_get_rss_key_base(struct enetc_si *si)
+{
+	if (is_enetc_rev1(si))
+		return ENETC_PRSSK(0);
+
+	return ENETC4_PRSSKR(0);
+}
+
 static int enetc_get_rxfh(struct net_device *ndev,
 			  struct ethtool_rxfh_param *rxfh)
 {
@@ -701,12 +709,14 @@ static int enetc_get_rxfh(struct net_device *ndev,
 	return err;
 }
 
-void enetc_set_rss_key(struct enetc_hw *hw, const u8 *bytes)
+void enetc_set_rss_key(struct enetc_si *si, const u8 *bytes)
 {
+	int base = enetc_get_rss_key_base(si);
+	struct enetc_hw *hw = &si->hw;
 	int i;
 
 	for (i = 0; i < ENETC_RSSHASH_KEY_SIZE / 4; i++)
-		enetc_port_wr(hw, ENETC_PRSSK(i), ((u32 *)bytes)[i]);
+		enetc_port_wr(hw, base + i * 4, ((u32 *)bytes)[i]);
 }
 EXPORT_SYMBOL_GPL(enetc_set_rss_key);
 
@@ -716,12 +726,11 @@ static int enetc_set_rxfh(struct net_device *ndev,
 {
 	struct enetc_ndev_priv *priv = netdev_priv(ndev);
 	struct enetc_si *si = priv->si;
-	struct enetc_hw *hw = &si->hw;
 	int err = 0;
 
 	/* set hash key, if PF */
-	if (rxfh->key && hw->port)
-		enetc_set_rss_key(hw, rxfh->key);
+	if (rxfh->key && enetc_si_is_pf(si))
+		enetc_set_rss_key(si, rxfh->key);
 
 	/* set RSS table */
 	if (rxfh->indir)
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
index 097a5b50e448..38ec7657b9aa 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
@@ -523,7 +523,7 @@ static void enetc_configure_port(struct enetc_pf *pf)
 
 	/* set up hash key */
 	get_random_bytes(hash_key, ENETC_RSSHASH_KEY_SIZE);
-	enetc_set_rss_key(hw, hash_key);
+	enetc_set_rss_key(pf->si, hash_key);
 
 	/* split up RFS entries */
 	enetc_port_assign_rfs_entries(pf->si);
-- 
2.34.1